/*
 *  Copyright 2010 sonrisa.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package com.zh.jbet.core.util;

import com.zh.jbet.core.exception.ExceptionCodesEnum;
import com.zh.jbet.core.exception.SystemException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 *
 * @author sonrisa
 */
public class CoreUtil {
    public static <T> T createEntity(Class<T> clz) {
        try {
            return clz.getConstructor().newInstance();
        } catch (Exception e) {
            throw new SystemException(ExceptionCodesEnum.ConfigurationException, "constructor not found", e);
        }
    }

    public static final String digest(String password) {
        //return password + "1";
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(password.getBytes());
            byte byteData[] = md.digest();
            //convert the byte to hex format method 2
            StringBuffer hexString = new StringBuffer();
            for (int i=0;i<byteData.length;i++) {
                    String hex=Integer.toHexString(0xff & byteData[i]);
                    if(hex.length()==1) hexString.append('0');
                    hexString.append(hex);
            }
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            throw new SystemException(ExceptionCodesEnum.ConfigurationException, e);
        }
    }
}
